1 /* $NetBSD: core_machdep.c,v 1.6 2021/09/23 15:19:03 ryo Exp $ */
2
3 /*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33
34 __KERNEL_RCSID(1, "$NetBSD: core_machdep.c,v 1.6 2021/09/23 15:19:03 ryo Exp $");
35
36 #include <sys/types.h>
37 #include <sys/cpu.h>
38 #include <sys/exec.h>
39 #include <sys/core.h>
40 #include <sys/lwp.h>
41 #include <sys/compat_stub.h>
42
43 #include <aarch64/pcb.h>
44 #include <aarch64/frame.h>
45 #include <aarch64/machdep.h>
46 #include <aarch64/armreg.h>
47
48 /*
49 * Write the machine-dependent part of a core dump.
50 */
51 int
cpu_coredump(struct lwp * l,struct coredump_iostate * iocookie,struct core * chdr)52 cpu_coredump(struct lwp *l, struct coredump_iostate *iocookie,
53 struct core *chdr)
54 {
55 struct coreseg cseg;
56 struct md_coredump md_core;
57 struct pcb * const pcb = lwp_getpcb(l);
58 int error;
59
60 if (iocookie == NULL) {
61 CORE_SETMAGIC(*chdr, COREMAGIC, MID_MACHINE, 0);
62 chdr->c_hdrsize = ALIGN(sizeof(*chdr));
63 chdr->c_seghdrsize = ALIGN(sizeof(cseg));
64 chdr->c_cpusize = sizeof(md_core);
65 chdr->c_nseg++;
66 return 0;
67 }
68
69 md_core.reg = lwp_trapframe(l)->tf_regs;
70 md_core.reg.r_tpidr = (uint64_t)(uintptr_t)l->l_private;
71
72 fpu_save(l);
73 if (fpu_used_p(l)) {
74 md_core.fpreg = pcb->pcb_fpregs;
75 } else {
76 memset(&md_core.fpreg, 0, sizeof(md_core.fpreg));
77 }
78
79 CORE_SETMAGIC(cseg, CORESEGMAGIC, MID_MACHINE, CORE_CPU);
80 cseg.c_addr = 0;
81 cseg.c_size = chdr->c_cpusize;
82
83 MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &cseg,
84 chdr->c_seghdrsize), ENOSYS, error);
85 if (error)
86 return error;
87
88 MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &md_core,
89 sizeof(md_core)), ENOSYS, error);
90
91 return error;
92 }
93